Digital full automatic breaker over-loading short cut testing test stand

Abstract

This invention relates to digital automatic breaker overload shortcut test bench, which comprises rack, digital alternating constant current, direct lifting transducer and position device, pressing device, transmission device, gate device and control device fixed on the rack, wherein, the position device card tank is connected to transmission device push board; pressing device is set with two gas cylinders fixed on both sides and with two free ends relative to two output ends; gate device is above press device; digital alternating constant power output end is connected to the lifting transducer input end.

Description

Technical field [0001] The invention belongs to a test device for circuit breaker detection, in particular to a digital full-automatic circuit breaker overload short-circuit test bench. Background technique [0002] At present, when detecting the overload and short-circuit characteristics of the circuit breaker, most of them are completed by manual operation. First of all, in the testing process, the long-time delay characteristics, short-circuit short-time delay and instantaneous characteristics need to be tested on different test benches; secondly, the electrode test position of the circuit breaker needs to be manually changed, and then fixed by a fixture, and manually re-tested. Snap and close the switch to complete the adjustment of each test position. The adjustment of the current is to adjust the primary stage of a step-up transformer with a voltage regulator to achieve the purpose of adjusting the experimental current, but the response speed of the artificially adjus...

AI Technical Summary

Problems solved by technology

The adjustment of the current is to adjust the primary stage of a step-up transformer with a voltage regulator to achieve the purpose of adjusting the experimental current, but the response speed of the artificially adjusted voltage regulator is slow, and the accuracy of the voltage regulator to adjust the experimental current is low; the circuit breaker Time timing is completed by switching on the timing circuit after the current relay detects the test action current. The action time of the current relay itself is 10ms to 20ms, which results in low accuracy of the test time, especially in the detection of instantaneous characteristics. The distribution of resistance parameters is relatively discrete, so the given instantaneous operating current is inaccurate, resulting in a large relative error

In addition, because the detection is carried out separately on the two test benches, the test efficiency is reduced

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